Improve CI with fmt and clippy

Author: ranfdev

flake.nix

@@ -12,6 +12,33 @@
         naersk-lib = naersk.lib.x86_64-linux;
         blueprint-compiler = packages.x86_64-linux.blueprint-compiler;
       };
+      checks.x86_64-linux.default = stdenv.mkDerivation {
+        name = "geopard-checks";
+        src = ./.;
+        cargoDeps = packages.x86_64-linux.geopard.cargoDeps;
+        configurePhase = ''
+          # These are replaced during the real build by meson
+          sed \
+            -e 's/str =.*;/str = "";/g' \
+            -e 's/i32 =.*;/i32 = 0;/g' \
+            src/build_config.rs.in \
+            > src/build_config.rs
+        '';
+	checkPhase = ''
+	  cargo fmt --check;
+	  cargo clippy -- -D warnings
+	'';
+	doCheck = true;
+	installPhase = ''echo "" > $out'';
+	nativeBuildInputs = with nixpkgs.legacyPackages.x86_64-linux; [openssl pkg-config glib gtk4 libadwaita clippy];
+	buildInputs = with nixpkgs.legacyPackages.x86_64-linux; [
+	  clippy
+	  rustPlatform.rust.cargo
+	  rustPlatform.rust.rustc
+	  rustPlatform.cargoSetupHook
+	  rustfmt
+	];
+      };
       packages.x86_64-linux.build-flatpak = callPackage ./nix/build-flatpak.nix { };
       packages.x86_64-linux.default = packages.x86_64-linux.geopard;
     };

nix/geopard.nix

@@ -55,8 +55,6 @@ stdenv.mkDerivation rec {
     rustPlatform.rust.cargo
     rustPlatform.cargoSetupHook
     rustPlatform.rust.rustc
-    rustfmt
-    clippy
   ];
 
   buildInputs = [
@@ -69,7 +67,6 @@ stdenv.mkDerivation rec {
     libadwaita
     openssl
   ];
-  doCheck = true;
   meta = with lib; {
     homepage = "https://github.com/ranfdev/Geopard";
     description = "Colorful, adaptive gemini browser";